Capital Gains Tax Estimator Use this calculator to estimate your capital gains tax. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content Comparing Mortgage Terms Estimate the total cost in today's dollars of various mortgage alternatives. The Long Run: Women and Retirement For women, retirement strategy is a long race. It’s helpful to know the route. Comparing Investments This calculator compares the net gain of a taxable investment versus a tax-favored one.